Steps in Muscle Contraction:
Which step of cross-bridge cycling is considered the power stroke?
A. when the myosin cross-bridge forms
B. when the phosphate is released and the myosin cross-bridge moves to the right in the animation
C. when ATP binds to the myosin head and releases it from the thin filament
D. when ATP is hydrolyzed and the myosin head moves to the left in the animation